Abstract: A slide bar locking arrangement for securing a lid to a cabinet to prevent unauthorized access. Hook members extending from the underside of the lid are received in and engage a plurality of corresponding apertures defined in a resiliently biased slide bar slidably mounted adjacent an inner wall of the cabinet, thereby securing the lid to the cabinet. During closing of the lid, the sides of the hook members contact the sides of the apertures causing the slide bar to move laterally until the hooks are secured in the apertures. A knob attached to the slide bar extends outside the cabinet and is operable to move the slide bar out of engagement with the hook members so that the lid may be opened. A lock mechanism is provided to secure the slide bar against movement so that the lid cannot be opened until the lock mechanism is unlocked.